Knife-sharpener.



E.P.JOHNSON KNIFE SHARPENER.

APPLICATION FILED FEB.17. 1915.

1,168,50? Patented Jan.18, 1916.

ffi'fizesa es Wmiimq 'rnc COLUMIHA PLANOGRAPI} (10., WASHINGTON, D. c

. proved 'WTTED EDWARD r. .ronivson, on or-rrcneo, ILLINOIS.

KNIFE-SHABPENER.

Specification of Letters Patent.

Patented Jan. is, 1916.

Application filed February 17, 1915. Serial No. 8,713.

ener particularly adapted forhousehold use; to provide a knife sharpener of 'th1s k1-nd.

which is simple in construction and inexpensive to manufacture and having an 1mform of double-surface abrasive member arranged to be normally coiled up onto a reel and supported in a position for instant use; and to provide an improved construction of the reeling mechanism for such devices.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which Figure l is a perspective view of the im- 1 proved knife sharpener showing the abrasive member extended in position for use. Fig. 2 is an enlarged sectional detail of the drum showing the arrangement of the nterlocking shoulders on the drum and spring.

In the construction shown in the drawings, the stropping member comprises two flexible strips having either natural or artificial sharpening surfaces attached only at their ends. The strips may be of different character or they both may be of the same material and same piece doubled upon itself, depending upon the kind of service for which it is to be used. The piece herein shown in emery cloth 3 doubled upon itself to form a band, it being necessarily formed that way for the reason that the manufacture of single strips having both faces coated or finished with the same or different abrasives is impractical. The ends of the strips are-boundtogether by a metal strip 4 having an aperture 5 formed therein and arranged for engagement with a lug or shoulder 6 on the drum 7. Thisallows the member 3 to be easily removed from the device, which is of advantage when, a worn-out member is to be replaced by a new one. The drum 7 is supported on a frame 11 and normally urged tocoil the strip 3 thereon.

When the member or band 3 is coiled up, the outer strip, having to wrap around a and a resident of Chicago, county of cylinder of larger diameter thanthe inner strip, is drawn up more rapidly than the inner strip. It is therefore necessary to provide means connecting the handle 8 to the band so as to permit a relative longitudinal shifting of the two strips in. orderto prevent buckling of the inner strip as it is coiled up',-;or buckling of the outer strip when the band is extended. In the construction illustrated, this is accomplished by looping the band 3 over the part 9 of the handle 8 whereby the handle is connected to the band so as to shift relative thereto.

The drum 7 is mounted on a shaft 10, the ends of which are squared and secured in the frame 11. A. helical spring 12 embraces the shaft 10, being secured thereto at one end as indicated at 13 and having a hook 14 formed on the other end and adapted for engagement with a shoulder 15 struck up from the end of the drum. The hook 14c and shoulder 15 are so arranged that they will have interlocking engagement only when the drum 1S rotated in the direction of the ar row 16, thereby preventing the band 3 from being improperly coiled onto the drum.

The frame 11 is formed of a single piece of flat metal bent substantially U-shaped, and has a hook 17 swiveled thereto by means of which the device is suspended from a hookor nail. A roller 18 is journaled across the open end of the 'U-shaped frame 11 over which the band 3 passes in traveling to and from the drum 7. A plate 19 is secured on the handle 8 as shown, which serves to brace the same,'and also provides a surface upon which advertisements may bestamped or otherwise applied.

The device is used in the following manner: Normally the band 3 is coiled onto the drum so that it is out of the way but always ready for instant use. /Vhen it is desired to sharpen a knife, the handle 8 is gripped in one hand and the band unreeled from the drum 7 into an extended position and may be turned to present either surface for use. As the band is unreeled, the free end thereof shifts around the part 9 to compensate for the difierence in the diameters of the coils of the inner and outer layers as hereinbe-' fore explained. l/Vhen one has finished using the device, the band is released, wherethat both layers are evenly coiled onto the drum.

from the spirit of thisinvention as defined by the following claims.

I claim v 1. A device of the class described, com

' prising a reel, a stropping member formed of two flexible strips attached'only at their ends, having suitable stropping surfaces and connected to said reel, a handle for said member, means connecting said strips Withsald handle so asto allow for a relative longitudinal shiftingof said strips when'traveling to and from said reel, and other means Although but one specific embodiment of normally actuating saidreel to coil said 'member thereon.

2. A device of the class described, comrisin areel a band of material havin an 2:! 7 Y b tive longitudinal shifting of said layers when saidband is traveling to and from said reel, and means normally actuating said reel to coil said band thereon.

, EDWARD P. JOHNSON.

' Witnesses: i I

I EUGENE A. RUMMLER,

MARI R. HOPKINS.

Copies of this patent maybesobtained for five cents each, by addressing the Commissioner of Patents,

' Washington, I). G.

Signedat Chicago this th day of Feb, 

